Given that a = [-1,2,1], b = [1,01], and c = [-5,4,5] determine each of the following. Show your a) a (b -c) (2 marks) (2 marks) b) A unit vector in the opposite direction of c c) The angle between b and c. (3 marks) d) projac (3 marks) e) Determine the volume of the parallelepiped formed by the three vectors. (6 marks)